fix: update remaining test stubs for List interface signature

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/internal/server/api_contract_test.go

@@ -1289,7 +1289,7 @@ func (r *stubUserSubscriptionRepo) ListActiveByUserID(ctx context.Context, userI
 func (stubUserSubscriptionRepo) ListByGroupID(ctx context.Context, groupID int64, params pagination.PaginationParams) ([]service.UserSubscription, *pagination.PaginationResult, error) {
 	return nil, nil, errors.New("not implemented")
 }
-func (stubUserSubscriptionRepo) List(ctx context.Context, params pagination.PaginationParams, userID, groupID *int64, status, sortBy, sortOrder string) ([]service.UserSubscription, *pagination.PaginationResult, error) {
+func (stubUserSubscriptionRepo) List(ctx context.Context, params pagination.PaginationParams, userID, groupID *int64, status, platform, sortBy, sortOrder string) ([]service.UserSubscription, *pagination.PaginationResult, error) {
 	return nil, nil, errors.New("not implemented")
 }
 func (stubUserSubscriptionRepo) ExistsByUserIDAndGroupID(ctx context.Context, userID, groupID int64) (bool, error) {

backend/internal/server/middleware/api_key_auth_google_test.go

@@ -135,7 +135,7 @@ func (f fakeGoogleSubscriptionRepo) ListActiveByUserID(ctx context.Context, user
 func (f fakeGoogleSubscriptionRepo) ListByGroupID(ctx context.Context, groupID int64, params pagination.PaginationParams) ([]service.UserSubscription, *pagination.PaginationResult, error) {
 	return nil, nil, errors.New("not implemented")
 }
-func (f fakeGoogleSubscriptionRepo) List(ctx context.Context, params pagination.PaginationParams, userID, groupID *int64, status, sortBy, sortOrder string) ([]service.UserSubscription, *pagination.PaginationResult, error) {
+func (f fakeGoogleSubscriptionRepo) List(ctx context.Context, params pagination.PaginationParams, userID, groupID *int64, status, platform, sortBy, sortOrder string) ([]service.UserSubscription, *pagination.PaginationResult, error) {
 	return nil, nil, errors.New("not implemented")
 }
 func (f fakeGoogleSubscriptionRepo) ExistsByUserIDAndGroupID(ctx context.Context, userID, groupID int64) (bool, error) {

backend/internal/server/middleware/api_key_auth_test.go

@@ -646,7 +646,7 @@ func (r *stubUserSubscriptionRepo) ListByGroupID(ctx context.Context, groupID in
 	return nil, nil, errors.New("not implemented")
 }
 
-func (r *stubUserSubscriptionRepo) List(ctx context.Context, params pagination.PaginationParams, userID, groupID *int64, status, sortBy, sortOrder string) ([]service.UserSubscription, *pagination.PaginationResult, error) {
+func (r *stubUserSubscriptionRepo) List(ctx context.Context, params pagination.PaginationParams, userID, groupID *int64, status, platform, sortBy, sortOrder string) ([]service.UserSubscription, *pagination.PaginationResult, error) {
 	return nil, nil, errors.New("not implemented")
 }